Results 111 to 120 of about 3,529,940 (309)

The M81 Group Dwarf Irregular Galaxy DDO 165. II. Connecting Recent Star Formation with ISM Structures and Kinematics

, 2011
We compare the stellar populations and complex neutral gas dynamics of the M81 group dIrr galaxy DDO 165 using data from the HST and the VLA. Paper I identified two kinematically distinct HI components, multiple localized high velocity gas features, and ...
Andrew E. Dolphin, Anil Seth, Bagetakos, Bellazzini, Bertelli, Chandar, Croxall, Daniel R. Weisz, David Cook, de Blok, Evan D. Skillman, Fabian Walter, Fall, Gil de Paz, Hans P. Most, Heckman, Janice Lee, John M. Cannon, Joung, Joung, Kellman, Kennicutt, Kim, Kobulnicky, Kobulnicky, Kobulnicky, Kunth, Lee, Leitherer, Mac Low, McQuinn, Oh, Rhode, Robert C. Kennicutt, Schlegel, Steven R. Warren, Sánchez-Salcedo, Thomasson, van der Hulst, Walter, Walter, Walter, Warren, Weisz, Weisz, Weisz   +45 more
core   +1 more source

Functional Integrals in Stellar Dynamics [PDF]

Symposium - International Astronomical Union, 1985
In the late 70s, the functional integral formulation equivalent to the Fokker-Planck equation was worked out (Graham). We apply this functional integral formulation to gravitationally interacting systems, whose dynamics may be analyzed by separating the forces operating on a particle into a mean field force and fluctuations due to random collisions at ...
openaire   +1 more source

Stellar dynamics in the Galactic centre: Proper motions and anisotropy [PDF]

, 2000
We report a new analysis of the stellar dynamics in the Galactic Centre, based on improved sky and line-of-sight velocities for more than 100 stars in the central few arcseconds from the black hole candidate SgrA*. The main results are as follows.
R. Genzel, C. Pichon, A. Eckart, O. Gerhard, T. O. Mpe, U. Basel, O. Strasbourg   +6 more
semanticscholar   +1 more source

Disordered but rhythmic—the role of intrinsic protein disorder in eukaryotic circadian timing

FEBS Letters, EarlyView.
Unstructured domains known as intrinsically disordered regions (IDRs) are present in nearly every part of the eukaryotic core circadian oscillator. IDRs enable many diverse inter‐ and intramolecular interactions that support clock function. IDR conformations are highly tunable by post‐translational modifications and environmental conditions, which ...
Emery T. Usher, Jacqueline F. Pelham
wiley   +1 more source

Stellar Ancestry Unlocked: Chemical and Orbital Clues Link Metal-poor Stars to Globular Clusters and the Galaxy’s Thick Disk

The Astronomical Journal
This study presents a detailed chemical, kinematic, and orbital dynamic analysis of five metal-poor stars in the solar neighborhood: HD 2665, HD 5916, HD 122956, HD 189349, and HD 218857.
Gizay Yolalan, Timur Şahin, Selçuk Bilir, Olcay Plevne   +3 more
doaj   +1 more source

Protein pyrophosphorylation by inositol pyrophosphates — detection, function, and regulation

FEBS Letters, EarlyView.
Protein pyrophosphorylation is an unusual signaling mechanism that was discovered two decades ago. It can be driven by inositol pyrophosphate messengers and influences various cellular processes. Herein, we summarize the research progress and challenges of this field, covering pathways found to be regulated by this posttranslational modification as ...
Sarah Lampe, Tanmay Kumar Mohanty, Rashna Bhandari, Dorothea Fiedler   +3 more
wiley   +1 more source

Time after time – circadian clocks through the lens of oscillator theory

FEBS Letters, EarlyView.
Oscillator theory bridges physics and circadian biology. Damped oscillators require external drivers, while limit cycles emerge from delayed feedback and nonlinearities. Coupling enables tissue‐level coherence, and entrainment aligns internal clocks with environmental cues.
Marta del Olmo, Carolin Ector, Hanspeter Herzel   +2 more
wiley   +1 more source

Stellar Streams Reveal the Mass Loss of Globular Clusters

The Astrophysical Journal Letters
Globular cluster (GC) streams, debris of stars tidally stripped from their progenitor GCs, have densities that correlate positively with the GC mass-loss rate.
Yingtian Chen, Hui Li, Oleg Y. Gnedin
doaj   +1 more source

Supercomputing and stellar dynamics

, 2009
In this paper I will outline some of the aspects and problems of modern celestial mechanics and stellar dynamics, in the context of the quickly growing computing facilities. I will point the attention on the great advantages in using, for astrophysical simulations, the modern, fast and cheap Graphic Processing Units (GPUs) acting as true supercomputers.
openaire   +3 more sources

Stellar dynamics and feedback connections to stellar evolution [PDF]

Proceedings of the International Astronomical Union, 2006
AbstractIn dense stellar systems, dynamical interactions between objects inevitably lead to frequent formation of exotic stellar objects and multiple systems, thereby imposing new questions for the stellar evolution theory. The evolutionary path of such systems could be different from that of the unperturbed objects, therefore, we must re-evaluate ...
openaire   +1 more source